Merge Outlook PST tool is one of the automated Utility solutions to merge multiple PST files into one and keeps them as a backup for future use with no file size limit issues. The tool quickly merges several large PST files in a single click. One can merge the PST files on the basis of date, size, and senders email address. Wider compatible, it is compatible with both ANSI and UNICODE PST files and with all versions of Outlook.